On Wednesday 24 June 2009, Marco Stornelli wrote:
> > Actually, reading from /dev/mem is only valid on real RAM. If the nvram
> > is part of an IO memory mapping, you have to do mmap()+memcpy() rather
> > than read(). So dd won't do it, but it's still easy to read from user
> > space.
>
> For "security" reasons pram reserve the region of memory with
> reserve_mem_region_exclusive().....
That will only prevent other device drivers from stepping on it,
/dev/mem does not care about mem_region reservations.
Arnd <><
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